Step 1: Upload the image. break>
Step 2: Go to the page you want the picture on. I usually open it in a new tab. Click on edit. break>
Step 3: Write [[Image:_____]] in the space. Obviously fill in the _____ with the name of the uploaded image EXACTLY as it is shown on the upload page. This is why it's nice to have it in a new tab (or you can copy and paste.)
The other two on that page have frames, are centered, and have captions, but you should be able to make yours that way too just by looking at the formatting on the edit page.
If you still don't want to mess with it, I'd be happy to do it for you if you want me to. I think it'd be sweet to have a gallery of awesome moped art in the wiki.